How long can an electromagnet keep its magnetism?

According to Magnet Lab, an electromagnet is created by applying electricity to a piece of ferrous (iron-containing) material wrapped with wire. The strength of the resulting electromagnetic field ...
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What does magnetism mean?

Literally, magnetism refers to the force exerted by a magnetic field. Figuratively, magnetism is used to describe the strong power or attraction of something, particularly someone's personality or...
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Does magnetism work?

On One Hand: Magnetism Is a Proven Scientific PhenomenaMagnetism exerts influence on metals and magnetically charged bodies. Magnetism charges an object with two poles. These repel like poles and a...
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